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With racing roots dating back over 70 years, JE Pistons is the industry leader in high-performance forged pistons. JE’s performance and quality is the result of decades of experience gained working with elite engine builders and racers from almost all types of motorsports competition, and is proven in our victories, championships, and innovations. JE controls every step of our manufacturing process, designing, forging, and machining all our pistons 100% in-house in our USA manufacturing facility. Find the perfect set of pistons for your next build off-the-shelf, or work with our technical experts to create a completely custom set.

JE History


The origins of what we know today as JE Pistons can be traced back to 1912 and the Los Angeles foundry of William Jahns Sr. and his company W.H. Jahns. Employing the tagline, “Nothing but Pistons,” the W.H. Jahns company produced pistons and semi-finished pistons until 1948, when Jahns Sr. retired. Meanwhile, Jahns’ son, William “Uncle Bill” Jahns Jr., started and had been working on his company Jahns’ Racing Pistons since 1947. Shortly after, the business became Jahns’ Engineering Pistons, and was finally shortened to JE Pistons.

Through the following years, JE Pistons’ technology evolved, from mastering casting technology in the 60s to researching and implementing forging technology in the 70s. Numerical Controlled (NC) machines were introduced to manufacturing in the early 80s, which was quickly improved to the use of Computer Numerical Controlled (CNC) machines and a proprietary piston design and machining program in the mid-80s.

Connect with us

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4 days ago

#FreshBuildFriday with this Audi RS3 build featuring a set of #jepistons and BoostLine connecting rods. Our pistons are the perfect upgrade for anyone taking their stock 5-cylinder TTRS/RS3 to the next level! #audi #ttrs #rs3 #jepistons #forgedpistons #boostlinerods #raceready

#repost from TOMSON Motorsport
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#FreshBuildFriday with this Audi RS3 build featuring a set of #JEPistons and BoostLine connecting rods. Our pistons are the perfect upgrade for anyone taking their stock 5-cylinder TTRS/RS3 to the next level! #Audi #TTRS #RS3 #JEPistons #ForgedPistons #BoostLineRods #RaceReady     

#Repost from TOMSON MotorsportImage attachment
5 days ago

More JE customs on hand for Hayes Spec Racing Engines. #jepistons #hayesspecraceengines #CustomPistonsMore sets of custom JE Pistons spec'd based on wear characteristics of previous sets used in service. Im liking how these small details are showing depending on how you are looking and and comparing used vs how they are before being push with some decent boost. Just busy here doing my thing.

Have a great weekend!

🙂🤙

#HayesSpecRaceEngines
#BluePrintEverything
#EngineBuilder
#EngineDevelopment
#DetailsMatter
#StartStongFinishStrong
#HorseBlinds
#WhatWorksForMe
#SubarusToTheTop
#TrackSubies
MITUTOYO AMERICA CORPORATION
Sunnen Products Company
QMP North
QMP Racing
#MC1
#SF1
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More JE customs on hand for Hayes Spec Racing Engines. #jepistons #HayesSpecRaceEngines #custompistons
7 days ago

No machining vs 3D undercrown milling 💪 Our undercrown machining process allows for uniform deck thickness, creating the lightest possible piston combination without sacrificing strength. #machining #CustomPistons #je #jepistons #forgedpistons ... See MoreSee Less

No machining vs 3D undercrown milling 💪 Our undercrown machining process allows for uniform deck thickness, creating the lightest possible piston combination without sacrificing strength. #machining #custompistons #je #jepistons #forgedpistons

1 CommentComment on Facebook

Very nice 👍

1 week ago

Not your standard piston at all 👀 Our #UltraSeries pistons for the B58 combines all of our premium features into an off-the-shelf piston kit! Including our proprietary Aligned Grain Flow Forging Technology that aligns forging grain flow at a molecular level in critical areas to make these the strongest pistons on the market! 💪🏁

#repost from P2uned
Stage 2 #b58engine build going on. Not your standard piston here. Featuring the ultra series 11:1 compression #jepistons runbc h beam rods and custom in house sleeving by us.

#jepistons #p2uned #b58 #ultraseriespistons #cncmachining #enginebuild
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Not your standard piston at all 👀 Our #UltraSeries pistons for the B58 combines all of our premium features into an off-the-shelf piston kit! Including our proprietary Aligned Grain Flow Forging Technology that aligns forging grain flow at a molecular level in critical areas to make these the strongest pistons on the market! 💪🏁

#repost from P2uned 
Stage 2 #b58engine build going on. Not your standard piston here. Featuring the ultra series 11:1 compression #jepistons runbc h beam rods and custom in house sleeving by us. 

#JEPistons #p2uned #b58 #ultraseriespistons #cncmachining #enginebuildImage attachment

2 CommentsComment on Facebook

would these work for a blower ? are they stronger then forged ?

JE who ??? Recently tried to order some rings to fit a JE piston I have. Couldn't get a live person on the phone, left messages no one ever called back.

2 weeks ago

#je Ultra Series Pistons and BoostLine Connecting Rods bringing unbeatable strength and power to this 4G63 build from Veicomer💪 #jepistons #boostlinerodsMitsubishi EVO 8 com Stroker kit

Cambota K1 Technologies
Bielas BoostLine
King Racing
JE Pistons Ultra

#jepistons #boostline #mitsubishievolution #evo8 #kingracing
#veicomer #fromportugaltotheworld
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#JE Ultra Series Pistons and BoostLine Connecting Rods bringing unbeatable strength and power to this 4G63 build from Veicomer💪 #JEpistons #BoostLineRods

2 CommentComment on Facebook

💪

2 weeks ago

Looking for a Valentine's Day gift that's sure to rev your engine? 💕 Give your ride the gift of performance with a set of JE Pistons. These performance pistons are the perfect way to show your engine some love this Valentine's Day!

Celebrate with up to 10% off your order over at je#jepistonsm#valentinesday #ValentinesDay
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Looking for a Valentines Day gift thats sure to rev your engine? 💕 Give your ride the gift of performance with a set of JE Pistons. These performance pistons are the perfect way to show your engine some love this Valentines Day! 

Celebrate with up to 10% off your order over at jepistons.com ❤

#JEPistons #ValentinesDayImage attachment

1 CommentComment on Facebook

Sadly no customer service from JE since they where bought out. Tried to get rings for a JE piston. Voicemail only no returned calls. Done with JE.

2 weeks ago

Sweet 128" getting fitted with a set of #JEpistons 💪 We have been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over 75 years of Harley piston experience!

📷: Crystal City MotorWorX
#JEpistons #JE #harley #harleydavidson #performanceharley #m8harley
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Sweet 128 getting fitted with a set of #JEpistons 💪 We have been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over 75 years of Harley piston experience! 

📷: Crystal City MotorWorX 
#JEpistons #JE #harley #harleydavidson #performanceharley #m8harley

1 CommentComment on Facebook

JE pistons in 80% plus of our warrantied engine builds.

3 weeks ago

JE #UltraSeries pistons on hand for this VW 1.8T build. These 20V piston combinations are 👌👌

#repost from BrianCrower Inc
#jepistons #je #PoweredByJE #forgedpistons #vw #volkswagen #18t #vw18t
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JE #UltraSeries pistons on hand for this VW 1.8T build. These 20V piston combinations are 👌👌 

#repost from BrianCrower Inc 
#jepistons #je #poweredbyje #forgedpistons #vw #volkswagen #18t #vw18t

3 CommentsComment on Facebook

Nice 👍

GTi 2.0

3 weeks ago

Another day, another set of one off custom pistons for our friends over at Cambridge Motorsport Parts. Almost too nice to be hidden away inside an engine 👀🤘

#repost from Cambridge Motorsport Parts "Nothing out of the ordinary. Just the usual extraordinary work by @jepistons Take it from us , we see a lot of pistons and JE’s machining and attention to detail remains up there with the best in the world."
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Another day, another set of one off custom pistons for our friends over at Cambridge Motorsport Parts. Almost too nice to be hidden away inside an engine 👀🤘

#repost from Cambridge Motorsport Parts Nothing out of the ordinary. Just the usual extraordinary work by @jepistons Take it from us , we see a lot of pistons and JE’s machining and attention to detail remains up there with the best in the world.Image attachmentImage attachment+1Image attachment

11 CommentsComment on Facebook

Awesome 😎

Only the best of the best when it comes to pistons JE Pistons !!! That’s why they are the forged pistons in side of the fully built twin turbo LS9 of the new Ultimate Camaro Carnage

Beautiful

that oil ring groove looks to be massive. the whole piston is a work of art.

Shovel head?

J.J. Jabaji when we say bump the compression 😛

Caio Ferraz " dome" axo q vem uma Taxinha

Basura de pistones

How bout some ironhead pistons?

Jag XK?

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